V = a*b*c
9200 = 23*b*25
b=9200/575
b=16
4) х²-10х+8=0
D=100-4*8=68
x1=10-2√17/2=5-√17
x2=10+2√17/2=5+<span>√17</span><span>
5) (4-4)</span>² / (4-3)*(4-5) = 0
6) √(16/9) * √(4/25)=4/3 * 2/5 = 8/15
1) 0,6(4x-3)+2,1(x-5)=0.
2,4x-1,8+2,1x-10,5
2,4x+2,1x=1,8+10,5
4,5x=12,3
2) 2,5(4a-8b)-(3a-4b)×1,4=0
10a-20b-4,2a+5,6b
10a-4,2a=20b-5,6b
5,8a=14,4b
3) -(-5,2-3,1t)-(2,4t-6,4)=0
5,2+3,1t+2,4t+6,4
3,1t+2,4t=-5,2-6,4
5,5t=-11,6